Confirmed through a short thread on Twitter, Phil Spencer says that the Xbox One is in line to support mouse input, allowing for both keyboard and mouse control on the company's gaming platform. The addition of a mouse on the Xbox One only seems fitting, given that the Xbox One is already running on PC hardware and a hybrid OS of Xbox/Windows.

@lgriao@PNF4LYFE@Tak225Th Yep, keyboard and mouse support for Xbox would need to be there for this to work, those aren't far away.

The news broke because a Twitter user asked whether the Xbox One would allow streaming from a PC to the console, basically a reverse of the game streaming feature. Spencer replied with "I like the idea of Win10->Xbox One streaming but don't have a plan yet". It will likely be a while before anything comes about, but this new feature tying together an Xbox and a PC sounds like it could find its way into existence sometime in the future.